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Research ArticleOriginal Research

Validation of the Asthma Quality of Life Questionnaire With Momentary Assessments of Symptoms and Functional Limitations in Patient Daily Life

Robin S Everhart, Joshua M Smyth, Alecia M Santuzzi and Barbara H Fiese
Respiratory Care April 2010, 55 (4) 427-432;
Robin S Everhart
Center for Health and Behavior, Syracuse University, Syracuse, New York.
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Joshua M Smyth
Center for Health and Behavior, Syracuse University, Syracuse, New York.
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  • For correspondence: [email protected]
Alecia M Santuzzi
Center for Health and Behavior, Syracuse University, Syracuse, New York.
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Barbara H Fiese
Department of Human and Community Development, University of Illinois, Urbana-Champaign, Illinois.
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Abstract

BACKGROUND: The ecological momentary assessment method may collect more accurate data about a patient's symptoms and functioning during the patient's normal daily life than does a retrospective measurement method such as the standardized Asthma Quality of Life Questionnaire (AQLQ-S), which relies on the patient's recollections of symptoms and functioning.

OBJECTIVE: To determine how well the AQLQ-S predicts actual asthma symptoms and functional limitations in patients' daily lives.

METHODS: With 91 patients with asthma, we measured quality of life at baseline with the AQLQ-S. Each participant then carried a palm-top computer for 1 week, which signaled the patient 5 times a day to complete a momentary assessment of his or her asthma symptoms, mood, activities, and peak expiratory flow. Once a day, upon awakening, the participants were asked to enter data on their sleep and nocturnal asthma symptoms.

RESULTS: The AQLQ-S scores were strongly associated with the momentary assessments of asthma symptoms and patient functioning. The unstandardized slope value indicates, for each 1-unit increase in quality of life, the corresponding change in the outcome variable (in the original units of measurement). Specifically, each 1-unit increase in quality of life was associated with better ambulatory outcomes (assessed on a 7-point scale): fewer coughing and wheezing symptoms (unstandardized slope = −0.44, P < .001); less symptom interference with sleep (unstandardized slope = −0.48, P < .001); less negative affect (unstandardized slope = −0.65, P = .04); and fewer activity restrictions (unstandardized slope = −0.54, P < .001). An increase in quality of life did not significantly predict peak expiratory flow (unstandardized slope = 11.53 L/min, P = .10).

CONCLUSIONS: With ecological momentary assessment we found that the AQLQ-S is a valid tool for assessing asthma symptoms and functional limitations. The AQLQ-S scores correctly predicted asthma symptoms, mood, sleep-interference, and activity restrictions in asthma patients' daily lives over a 1-week interval. These data support the AQLQ-S in the clinical management of asthma.

  • asthma
  • quality of life
  • ecological momentary assessment
  • ambulatory experiences
  • respiratory symptoms
  • patient care

Footnotes

  • Correspondence: Joshua M Smyth PhD, Center for Health and Behavior, Syracuse University, 402 Huntington Hall, Syracuse NY 13244-2340. E-mail: jmsmyth{at}syr.edu.
  • This research was partly supported by the National Heart, Lung, and Blood Institute (grant R01-HL67990). The authors have disclosed no conflicts of interest.

  • Copyright © 2010 by Daedalus Enterprises Inc.
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Respiratory Care: 55 (4)
Respiratory Care
Vol. 55, Issue 4
1 Apr 2010
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Validation of the Asthma Quality of Life Questionnaire With Momentary Assessments of Symptoms and Functional Limitations in Patient Daily Life
Robin S Everhart, Joshua M Smyth, Alecia M Santuzzi, Barbara H Fiese
Respiratory Care Apr 2010, 55 (4) 427-432;

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Validation of the Asthma Quality of Life Questionnaire With Momentary Assessments of Symptoms and Functional Limitations in Patient Daily Life
Robin S Everhart, Joshua M Smyth, Alecia M Santuzzi, Barbara H Fiese
Respiratory Care Apr 2010, 55 (4) 427-432;
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Keywords

  • asthma
  • quality of life
  • ecological momentary assessment
  • ambulatory experiences
  • respiratory symptoms
  • patient care

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